基于模块计算机的千兆网磁共振谱仪控制接口  

A Computer-on-Module Based High-Performance Control Interface with Gigabit Ethernet for Magnetic Resonance Imaging Spectrometer

作　　者：王洪[1] 熊泽冲[2] 林先钗 王为民[2] 

机构地区：[1]泰山医学院放射学院,山东泰安271016 [2]北京大学信息科学与技术学院电子系量子所,北京100871 [3]北京万东医疗装备股份有限公司磁共振成像产品事业部,北京100016

出　　处：《波谱学杂志》2012年第4期499-507,共9页Chinese Journal of Magnetic Resonance

基　　金：国家科技重大专项资助项目(2011ZX05008-004)

摘　　要：提出了一个基于模块计算机的磁共振谱仪的控制接口,它建立了核磁共振成像谱仪与上位计算机之间的通信,实现了控制谱仪、上传和下载、数据处理等功能,具备较高的传输速度,以及较好的实时性.该接口以硬件模块的方式集成到谱仪上,通过千兆和百兆以太网连接上位机,接收下传至谱仪的序列;用中断机制和直接内存存取(DMA)方式实现与谱仪的数据传输,并将处理采集到的回波数据并上传到上位机.控制接口的设计采用模块计算机Computer-On-Module(COM)的设计思路,以高性能的处理器为嵌入式平台,在Linux操作系统下开发驱动程序和应用程序.实验证明,该模块具有数据处理速度快、传输速率高,成本低,体积紧凑,扩展性强等特点,是实现磁共振谱仪高性能的控制接口的理想方案.A control interface for magnetic resonance imaging （MRI） spectrometer was presented. The control interface connects the host computer and the MRI spectrometer, which has the following functionalities： supervising the operation of pulse programmer and receiver, using direct memory access （DMA） and transferring the processed data via Gigabit Ethernet transmission. The real-time interaction between the host PC and the spectrometer is achieved through two Ethernet links. Its scalable hardware consists of a computer-on-module （COM） and a carrier. The COM possesses a high-performance CPU, which has both Cotex-A8 and DSP sub-units. The software, including Linux kernel, drivers and a console server, was developed for the board. Tests show that this scalable structure can achieve high data processing ＆ transmission speed. With features such as low-cost and highlyqntegrated characteristics, the control interface is suitable for most MRI spectrometers, especially for portable ones.

关 键 词：核磁共振(NMR) 谱仪 模块计算机 控制接口 

分 类 号：O482.53[理学—固体物理]